Tweak dockerfiles to install build dependencies and remove them when done

Signed-off-by: Emiliano Suñé <emiliano.sune@gmail.com>

Author: esune

docker/Dockerfile

@@ -44,6 +44,7 @@ RUN apt-get update -y && \
     apt-get install -y --no-install-recommends \
     apt-transport-https \
     ca-certificates \
+    build-essential \
     bzip2 \
     curl \
     git \
@@ -88,6 +89,9 @@ COPY --from=build /src/dist/aries_cloudagent*.whl .
 
 RUN pip install --no-cache-dir --find-links=. aries_cloudagent${acapy_reqs} && rm aries_cloudagent*.whl
 
+# Clean-up unneccessary build dependencies and reduce final image size
+RUN apt-get purge -y --auto-remove build-essential
+
 USER $user
 
 ENTRYPOINT ["aca-py"]

docker/Dockerfile.indy

@@ -115,6 +115,7 @@ RUN apt-get update -y && \
     apt-get install -y --no-install-recommends \
     apt-transport-https \
     ca-certificates \
+    build-essential \
     bzip2 \
     curl \
     git \
@@ -257,4 +258,7 @@ COPY --from=acapy-builder /src/dist/aries_cloudagent*.whl .
 
 RUN pip install --no-cache-dir --find-links=. aries_cloudagent${acapy_reqs} && rm aries_cloudagent*.whl
 
+# Clean-up unneccessary build dependencies and reduce final image size
+# RUN apt-get purge -y --auto-remove build-essential
+
 ENTRYPOINT ["aca-py"]